Cast-steel chain



A. T. DEXTER.

CAST STEEL CHAIN.

APPUCATION FILED sun: i. 1919.

1,365,770, Patented Jan. 18,1921.

2 SHEETS -SHEET l.

Inventor mm 7. XM By Attorney A. T. DEXTER.

CAST STEEL CHAIN.

APPLICATION FILED JUNE 7. 1919.

Patented Jan. 18, 1921.

2 SHEETSSHEET 2,

Inventor UNITED srArps PATENT OFFIQE.

ALLEN T. DEXTER, OF CLEVELAND, OHIO, ASSIGNOR TO THE NATIONAL MALLE- ABLE CASTINGS COMPANY, OF CLEVELAND, OHIO.

CAST-STEEL CHAIN.

Application filed June 7,

To all whom it may concern:

Be it known that I, ALLEN T. DEXTER, a citizen of the United States, residing at Cleveland, (Juyahoga county, Ohio, have invented new and useful Improvements in the Manufacture of Cast-Steel Chain, of which the following is a specification, reference be ing had to the accompanying drawings, in which- Figure 1 is a vertical longitudinal section of two tiers of mold sections employed in carrying out my invention; Fig. 2 is a top plan view thereof; Fig. a perspective of a mold section; and Fig. 4: is an end elevation of mold sections showing a modified form of pouring cup which may be employed in carrying out my invention.

My invention relates to the making of caststeel chain links in the form of a con tinuous chain. In carrying out my invention I prefer to employ sand mold sections arranged in tiers so as to form impressions for complete sections or shots of chain in order that two or more such shots or sections may be formed at one series of pours. My invention. also consists in the *arious steps and features which I shall hereinafter describe and claim.

Referring to the drawinqs in which I have shown mold sections suitable for carrying out my invention, the mold sections are preferably formed in a mold box such as I have described and claimed in my (so-pend ing application filed of even date herewith Serial No. 302,568 for the manufacture of cast steel chain. Each mold section contains on one face of the mold an incomplete halt impression A and within the body of the mold two separate quarter link impressions B. which extend within the impression A. and intersect the plane thereof. Each mold sect-ion (except when used as a bottom section) also has im )lTQSSlOTlS C for gates or shrinkheads whici lead into the quarter link impressions B. lVhen it is desired to form a section of chain. links a series of quarter molds 2 (made without gate impressions) are arranged end to end, as is shown in Fig. 1, with the projections 6 on the end of one section fitting in corresponding cesses 7 in the end of the next adjacent sec tion. and preformed links are placed in the impressions A. series of complementary quarter molds 3 are next put in place with their impressions A turned downwardly Specification of Letters Patent.

Patented Jan. 18, 1921.

1919. Serial No. 302,567.

facing the impressions A in the bottom or first mentioned series, with the impressions B of the two series in registry and with the coniplcnicntary gate impressions (l in the second mentioned series facing each other, thus c m .iletin :1 tier of mold sections. A third series of quarter molds 4 is then placed on top of the first tier, but with the impressions for the preformed links uppermost and the gate impressions in registry with those of the second series. A. second set of preformed links is then placed in the impressions A. and then a fourth series of quarter molds 5 with the in'ipipssions l facing; the im p11 of the third series .ons a placed in position, so arranged that the various complementer quarter link and gate impressions are in registry, thus completing; thesecond tier of mold sections.

llpon the pouring gates in the upper tier of molds pouring cups 8 are placed. The stack of molds is then weighted to prevent the lifting of the molds by the metal during the pouring operation. The meeting edges of the (pier molds are lutcd with a silicioiis material where this is deemed necessary, and the k is eady for pouring. It will be seen that the pressions B for the links to be poured are arianged on edge and that in pourii'ip; the metal will be supplied to and through the central section of each link.

The molds are then poured, the metal passing through pouring cups 8, the gates C through the stud impression Z) of the up per link impression. B, through the lower gate (3, and then into the impression B for the lower link. As the pouring is continued the metal rises and fills the upper impressions B and the cups 8. The molds are then broken up and two shots or connected sections of chain are found to have been formed. It is obvious that as many links as are desired may be connected together bv the method and molds which I have dscribed.

If desired, four sections of chain may be cast at one time. as is shown in Fig. 4:, by pouring two rows of mold sections through a series of pouring cups 9, arranged that two connecting links in each row may be poured at the same time.

It has been toun d to he of great advancage to cast the connecting links on edge and with the links arranged one above the other, since it greatly facilitates the casting operations and the production of sound links.

I have also effected a considerable economy of space and sand, by making the mold sections narrower than the precast links, as it is not necessary that these precast links be contained wholly within the mold sections, since the impressions therefor are not poured.

The terms and expressions which I have employed are intended to be used as terms of description and not of limitation since I recognize that modifications of the steps and features which I have described may he made within the scope of the invention claimed.

What I claim is:

1. The herein described process of making cast steel chain, which comprises arranging a series of mold sections each containing quarter link impressions therein, superimposing upon the first series of mold sections a second series containing impressions complementary to those oi the first series, and also containing gate impressions, thereby forming a set of complete molds, placing other similarly arranged series of mold sections upon said first set of molds and with connecting impressions to form a second set of completed molds, and simultaneously forming complete chain links in two separate chains by a single pour of metal.

2. The herein described process of making cast steel chain which comprises arranging a series of mold sections each containing within it separate quarter link inipressiolns and also having a part impression for another link, assembling such mold sections to form a complete link impression from the quarter link impressions with the quarter link impressions arranged in a vertical plane and with preformed links in the part impressions, and extending beyond the sides oi the mold, and pouring the link through the top edge of the impression, thereby forming a plurality of interconnected links.

3. A mold stack for casting chain. which comprises a plurality of superimposml tiers of mold sections. each tier containing link impressions interlinked in a. chain oi inipressions. gates connecting impressions of one tier with the impressions of. another tier, and a pouring gate leading into each such connected pair of link inn'iressions, whereby chain links in two separate chains are formed by a. single pour of metal.

1-. A mold stack for casting chain, which comprises a plurality oi? superimposed tiers of mold sections, each tier containing complete link impressions alternating with impressions for preformed links. gates (01]- necting the complete impressions 01 one tier with. the impressions oi? another tier, and a. pouring gate connected with each link i1npression in the upper tier. whereby chain links in two separate chains are formed by a single pour of metal.

A. mold stack for casting chain. which comprises a. plurality of mold sections arranged in sets, each set containing a plurality of complete link impressions arranged one above the other. av feeder connecting such link impressions, and a pouring; L'ate connected with one of said link impressions. to permit the metal to flow successively into the said link impression to term separate chain links.

ALLEN T. DEXTER. 

